43681946 has 32 divisors (see below), whose sum is σ = 84516480. Its totient is φ = 16430400.

The previous prime is 43681943. The next prime is 43681949. The reversal of 43681946 is 64918634.

It is an interprime number because it is at equal distance from previous prime (43681943) and next prime (43681949).

It is a super-2 number, since 2×43681946² = 3816224812693832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43681943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (2641140).

Almost surely, 2^43681946 is an apocalyptic number.

43681946 is a deficient number, since it is larger than the sum of its proper divisors (40834534).

43681946 is a wasteful number, since it uses less digits than its factorization.

43681946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830.

The product of its digits is 124416, while the sum is 41.

The square root of 43681946 is about 6609.2318767010. The cubic root of 43681946 is about 352.1821382195.

The spelling of 43681946 in words is "forty-three million, six hundred eighty-one thousand, nine hundred forty-six".